1/* $NetBSD: prompt.c,v 1.23 2016/02/16 15:53:48 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Christos Zoulas of Cornell University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include "config.h" 36#if !defined(lint) && !defined(SCCSID) 37#if 0 38static char sccsid[] = "@(#)prompt.c 8.1 (Berkeley) 6/4/93"; 39#else 40__RCSID("$NetBSD: prompt.c,v 1.23 2016/02/16 15:53:48 christos Exp $"); 41#endif 42#endif /* not lint && not SCCSID */ 43#include <sys/cdefs.h> 44__FBSDID("$FreeBSD: stable/11/lib/libedit/prompt.c 313981 2017-02-20 03:33:59Z pfg $"); 45 46/* 47 * prompt.c: Prompt printing functions 48 */ 49#include <stdio.h> 50#include "el.h" 51 52private Char *prompt_default(EditLine *); 53private Char *prompt_default_r(EditLine *); 54 55/* prompt_default(): 56 * Just a default prompt, in case the user did not provide one 57 */ 58private Char * 59/*ARGSUSED*/ 60prompt_default(EditLine *el __attribute__((__unused__))) 61{ 62 static Char a[3] = {'?', ' ', '\0'}; 63 64 return a; 65} 66 67 68/* prompt_default_r(): 69 * Just a default rprompt, in case the user did not provide one 70 */ 71private Char * 72/*ARGSUSED*/ 73prompt_default_r(EditLine *el __attribute__((__unused__))) 74{ 75 static Char a[1] = {'\0'}; 76 77 return a; 78} 79 80 81/* prompt_print(): 82 * Print the prompt and update the prompt position. 83 */ 84protected void 85prompt_print(EditLine *el, int op) 86{ 87 el_prompt_t *elp; 88 Char *p; 89 int ignore = 0; 90 91 if (op == EL_PROMPT) 92 elp = &el->el_prompt; 93 else 94 elp = &el->el_rprompt; 95 96 if (elp->p_wide) 97 p = (*elp->p_func)(el); 98 else 99 p = ct_decode_string((char *)(void *)(*elp->p_func)(el), 100 &el->el_scratch); 101 102 for (; *p; p++) { 103 if (elp->p_ignore == *p) { 104 ignore = !ignore; 105 continue; 106 } 107 if (ignore) 108 terminal__putc(el, *p); 109 else 110 re_putc(el, *p, 1); 111 } 112 113 elp->p_pos.v = el->el_refresh.r_cursor.v; 114 elp->p_pos.h = el->el_refresh.r_cursor.h; 115} 116 117 118/* prompt_init(): 119 * Initialize the prompt stuff 120 */ 121protected int 122prompt_init(EditLine *el) 123{ 124 125 el->el_prompt.p_func = prompt_default; 126 el->el_prompt.p_pos.v = 0; 127 el->el_prompt.p_pos.h = 0; 128 el->el_prompt.p_ignore = '\0'; 129 el->el_rprompt.p_func = prompt_default_r; 130 el->el_rprompt.p_pos.v = 0; 131 el->el_rprompt.p_pos.h = 0; 132 el->el_rprompt.p_ignore = '\0'; 133 return 0; 134} 135 136 137/* prompt_end(): 138 * Clean up the prompt stuff 139 */ 140protected void 141/*ARGSUSED*/ 142prompt_end(EditLine *el __attribute__((__unused__))) 143{ 144} 145 146 147/* prompt_set(): 148 * Install a prompt printing function 149 */ 150protected int 151prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide) 152{ 153 el_prompt_t *p; 154 155 if (op == EL_PROMPT || op == EL_PROMPT_ESC) 156 p = &el->el_prompt; 157 else 158 p = &el->el_rprompt; 159 160 if (prf == NULL) { 161 if (op == EL_PROMPT || op == EL_PROMPT_ESC) 162 p->p_func = prompt_default; 163 else 164 p->p_func = prompt_default_r; 165 } else { 166 p->p_func = prf; 167 } 168 169 p->p_ignore = c; 170 171 p->p_pos.v = 0; 172 p->p_pos.h = 0; 173 p->p_wide = wide; 174 175 return 0; 176} 177 178 179/* prompt_get(): 180 * Retrieve the prompt printing function 181 */ 182protected int 183prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op) 184{ 185 el_prompt_t *p; 186 187 if (prf == NULL) 188 return -1; 189 190 if (op == EL_PROMPT) 191 p = &el->el_prompt; 192 else 193 p = &el->el_rprompt; 194 195 if (prf) 196 *prf = p->p_func; 197 if (c) 198 *c = p->p_ignore; 199 200 return 0; 201} 202